On 24 December 2014, the newly founded party Reformers for Democracy and Development of former Democratic Left MP Spyros Lykoudis announced an alliance with The River. On 5 January 2015, the Liberal Alliance party suspended talks about a joint electoral list with The River after the participation of Liberal Alliance's president Gregory Vallianatos had reportedly been ruled out by The River officials. Later, The River's leader Theodorakis and Theodoros Skylakakis, the leader of the liberal party Drasi, gave a joint press conference announcing a joint electoral list for the forthcoming legislative election. In the January 2015 legislative election on 25 January 2015 The River received 6.1% of the electoral vote, finishing fourth place with a mandate for 17 seats in the Hellenic Parliament. In the aftermath of the election party leader Theodorakis stressed that Greece needed to avoid another snap election, and while ready to talk with SYRIZA leader Alexis Tsipras about forming a coalition government, he said they wouldn't support any coalition that includes anti-European forces. The River became part of the parliamentary opposition to the governing first Tsipras cabinet. In the second election of the year, the September 2015 legislative election on 20 September 2015, the party received a reduced vote count of 4.1%, receiving 11 seats, remaining in opposition.
Resignations
On 19 April 2016, Yiannis Theoharis resigned from To Potami's parliamentary group. On 18 October 2016, Iasonas Fotilas was expelled from the party. On 24 January 2017 he joined New Democracy. On 21 November 2016, Katerina Markou declared herself an independent. On 27 February 2018 she joined New Democracy. On 13 January 2017, Rodopi MP Ilhan Ahmet became the fourth MP elected in the September 2015 general election to resign from the party. He later announced he was joining the Democratic Alignment parliamentary group. On 7 February 2017, Larissa MP Konstantinos Bargiotas resigned from the party, indicating that he would join the Democratic Alignment parliamentary group.
In July 2017, PASOK leader Fofi Gennimata announced the formation of a new centre-left party before the end of the year. In the summer of 2017, Potami leader Stavros Theodorakis decided to participate in the creation of the party to provide an alternative to Syriza, led by prime minister Alexis Tsipras, and New Democracy, led by Kyriakos Mitsotakis. A leadership election for the new party will be held on 12 November and 19 November 2017, with initially 10 candidates declaring their participation, including Theodorakis. After the leadership election both Potami and PASOK–DIMAR will continue to have separate parliamentary groups until the new party's founding congress in spring 2018. On the first stage open primary election on 12 November 2017, Theodorakis came in fourth place with 9.8% of the vote, failing to reach the second round. The run-off election on 19 November was won by Gennimata with 56% of the vote, with the new party's official foundation scheduled for 2018. On 2 December 2017, Theodorakis was announced as being part of the six-member ruling council for the new party, the Movement for Change.
Aftermath
On 1 July 2018, The River exited from KINAL due to issues including disagreements between Theodorakis and Gennimata over the Macedonia naming dispute. In the 2019 European Parliament election on 26 May 2019, The River received just 1.5% of the national vote, failing to return any MEPs. Following the result, party leader Stavros Theodorakis announced that To Potami would ot participate to the 2019 legislative election; Theodokratis also announced its resignation from party leadership.
Ideology
Following its launch, The River was initially described by the media as pro-European and centrist, inspired by social democracy and social liberalism and heavily reliant on Theodorakis' personal popularity to attract voters. The general description of the party's political position ranged from centrist to centre-left.
